factorise (x-2)²-16
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Answered by
1
Answer:
x-2)²-16. yea Jo hai isko do bar multiply it kr piche 16 likh do ok
Answered by
1
Answer:
(x+2)^2 = 20
x^2 + 4x + 4 = 20
x^2 + 4x = 16
x^2 + 4x - 16 = 0
D = b^2 - 4ac,
D = 16 - 4(1)(-16)
D = 16 +64
D = 80
X = [{-b±(D)^1/2}/2a]
X = [{-4±(80)^1/2}/2(1)]
X = [{-4±4(5)^1/2}/2]
X = -2 ± 2(5)^1/2
X = -2[1 + 5^1/2] or X = -2[1 - 5^1/2]
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